SD card including smart card and method for accessing to the same based on a file system
US8285899B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2010 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Jan 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07732
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A smart SD card and a method of accessing the same are disclosed, which resolve a problem of incompatibilities between drivers of various smart SD cards. The smart SD card includes a SD interface (201), a SD memory (203), a smart card (204) and a SD controller (202). The method of accessing the SD card includes: an application program performing a write operation on the smart card interface file and notifying the SD controller establishing a communication connection with the smart card; the application program reading the interface file and receiving response data returned by the smart card via the SD controller; the establishing of the connection being successful, the application program writing the smart card operation commands into the interface file, and the SD controller forwarding the commands to the smart card; the application program reading the interface file and receiving response data returned by the smart card via the SD controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.